MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
Make sure the holes in the motor mount are letting the chain pins all the way in, try a different chain link, or you may have a deformity in your motor mount. The link on the motor mount is a chain link embedded into the mount. It shouldnt act differently than any of the other links. The chain links I have printed takes a very high force to make them come unlinked.